Hi Soothing,
So crawling on my glass and substrate are planaria like this:
What is on my plants and glass in various places are Hydra like this:
I also saw one Hydra free floating in the aquarium. My guess was that it was relocating.
Still apprehensive on using "No Planaria".
Ohmiko, if you use it please let me know how it goes. I will do the same.